EP3070568B1 - Pressure-regulating valves - Google Patents
Pressure-regulating valves Download PDFInfo
- Publication number
- EP3070568B1 EP3070568B1 EP16161247.8A EP16161247A EP3070568B1 EP 3070568 B1 EP3070568 B1 EP 3070568B1 EP 16161247 A EP16161247 A EP 16161247A EP 3070568 B1 EP3070568 B1 EP 3070568B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- circuit
- port
- circuit leg
- outlet port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/02—Modifications to reduce the effects of instability, e.g. due to vibrations, friction, abnormal temperature, overloading or unbalance
Description
- The present invention relates to valves, and, in particular, to pressure-regulating valves.
- Traditional pressure-regulating valves used in various pumps can sometimes experience instability, potentially resulting in pump and valve failure, for example instability due to contamination. Additionally, traditional valves can sometimes experience high droop, which can cause wear on the pumping elements. Droop is a term for the relationship between outlet pressure and flow rate. Flat droop indicates little to no change in outlet pressure as the flow rate increases and positive droop would indicate a gain in outlet pressure as the flow rate increases. Generally, the desired droop characteristic of the valve would be negative, meaning the valve sets a desired pressure for low-flow scenarios, and that pressure then reduces during high-flow scenarios, when other loads (e.g. centrifugal) are increasing on the pump. However, the traditional configuration used to achieve negative droop tends not to be prone to contamination. Maintenance is therefore required to alleviate the contamination. There are also scenarios in which flat or positive droop may be desired.
- Such conventional methods and systems have generally been considered satisfactory for their intended purposes. However, there is still a need in the art for systems and methods that allow for improved regulating valves. The present invention provides a solution for these needs.
-
US 2225916 A describes a fluid pressure regulating device.US 5735308 A describes an automatic constant-pressure regulating lift device. - A multi-bend control circuit for fluid communication with an outlet port of a valve includes a first circuit leg extending in a first direction and a second circuit leg extending at an angle from the first circuit leg in a second direction. A third circuit leg extends at an angle from the second circuit leg in a third direction different from the second direction. A sense line tap is in fluid communication with at least one of the first, second or third legs.
- In accordance with embodiments, the second direction is perpendicular to the first direction. The third direction can be perpendicular to the second direction, and/or at an angle with respect to the first direction. The third direction can be oblique to a plane defined by the first and second directions. A portion of the second circuit leg can extend beyond the intersection of the second circuit leg and the third circuit leg. The first circuit leg can have an inlet. The sense line tap can be in fluid communication with at least one of the first, second or third legs at a point that has a pressure less than that of the inlet of the first circuit leg.
- A pressure valve is provided as claimed in claim 1 and includes a valve body having a first end and a second end defining a longitudinal axis therebetween. The valve body includes an inlet port, an outlet port and a sense port. All ports are in fluid communication with the valve body to regulate pressure at the outlet port based on pressure at the sense port. The pressure valve includes the multi-bend control circuit, as recited above. The multi-bend control circuit is in fluid communication with the outlet port and the sense port. The first circuit leg extends from the outlet port. The pressure valve includes a sense line fluidly connecting the sense port and the sense line tap of the multi-bend control circuit described above. It is contemplated that the sense line tap can be in fluid communication with at least one of the first, second or third legs at a point that has a pressure less than that of the outlet port.
- These and other features of the systems and methods of the subject invention will become more readily apparent to those skilled in the art from the following detailed description of the preferred embodiments taken in conjunction with the drawings.
- So that those skilled in the art to which the subject invention appertains will readily understand how to make and use the devices and methods of the subject invention without undue experimentation, preferred embodiments thereof will be described in detail herein below with reference to certain figures, wherein:
-
Fig. 1 is a schematic view of an exemplary embodiment of a pressure-regulating valve constructed in accordance with the present disclosure, showing the valve connected to a multi-bend control circuit; and -
Fig. 2 is a perspective view of the multi-bend control circuit ofFig. 1 , showing the first and third circuit legs with the second circuit leg connecting therebetween. - Reference will now be made to the drawings wherein like reference numerals identify similar structural features or aspects of the subject disclosure. For purposes of explanation and illustration, and not limitation, a schematic view of an exemplary embodiment of a pressure-regulating valve in accordance with the disclosure is shown in
Fig. 1 and is designated generally byreference character 100. Other embodiments of pressure-regulating valves in accordance with the disclosure, or aspects thereof, are provided inFig. 2 , as will be described. The embodiments ofpressure regulating valve 100 and aspects thereof are able to control the valve's backside pressure to achieve positive, negative, or flat droop performance depending on where the sense line is located, allowing valve performance to be tuned, without adding increased complexity to the valve itself. - As shown in
Fig. 1 , apressure regulating valve 100 includes avalve body 102 having afirst end 104 and asecond end 106 defining a longitudinal axis A therebetween. Valvebody 102 includes aninlet port 108, anoutlet port 110 and asense port 112. Al1 ports are in fluid communication withvalve body 102 to regulate pressure atoutlet port 110 based on pressure atsense port 112.Pressure valve 100 includes amulti-bend control circuit 101 for fluid communication withoutlet port 110 ofvalve 100.Multi-bend control circuit 101 is in fluid communication withoutlet port 110 andsense port 112 - With reference now to
Figs. 1 and 2 ,multi-bend control circuit 101 includes afirst circuit leg 103 extending in a first direction fromoutlet port 110, schematically shown byarrow 114, and asecond circuit leg 105 extending at an angle fromfirst circuit leg 103 in a second direction, schematically shown byarrow 116. Athird circuit leg 107 extends at an angle fromsecond circuit leg 105 in a third direction, schematically shown byarrow 118, different fromsecond direction 116. Asense line tap 120 is in fluid communication withthird leg 107.Pressure valve 100 includes asense line 128 fluidly connectingsense port 112 andsense line tap 120. - As shown in
Fig. 2 ,first circuit leg 103 has aninlet 126.Sense line tap 120 is in fluid communication withthird circuit leg 107 at a point that has a pressure less than that ofinlet 126 offirst circuit leg 103, and less than that ofoutlet port 110. Instead of the traditional straight flow path,multi-bend control circuit 101 creates a sigmoidal flow path downstream ofoutlet port 110.Multi-bend control circuit 101 directs the flow through multiple bends creating low-pressure regions within thecircuit 101 during high-flow scenarios, e.g. 10,000 lb/hr (1.26 kg/s) to 30,000 lb/hr (3.78 kg/s). By placing sense line tap 120 into the underside ofthird circuit leg 107, backside pressure drops as flow increases, leading to negative valve droop. Negative valve droop is sometimes required during high-flow scenarios to reduce wear on pumping components, therein increasing component life. - With continued reference to
Fig. 2 ,second direction 116 is perpendicular tofirst direction 114.Third direction 118 is perpendicular tosecond direction 116 and at an angle with respect tofirst direction 114.Third direction 118 is oblique with respect to a plane defined byfirst direction 114 andsecond direction 116. It is also contemplated that first, second and third directions can all be defined in a common plane. A cappedportion 122 ofsecond circuit leg 105 extends beyond theintersection 124 ofsecond circuit leg 105 andthird circuit leg 107 to accommodate for the machining, e.g. drilling, ofmulti-bend circuit 101 during manufacture. Those skilled in the art will readily appreciate that first andthird circuit legs second circuit leg 105, depending on drill start location. It is also contemplated that these extensions, e.g. cappedportion 122, would not exist for any ofcircuit legs multi-bend circuit 101 is manufactured by casting. - It is contemplated that the
sense line tap 120 can be placed in a variety of different locations throughoutmulti-bend control circuit 101 depending on the desired performance result. A variety of different valve performance characteristics can be achieved depending on the placement ofsense line tap 120, for example, positive droop and/or relatively flat droop. This is due to the 3-D pressure gradient that exists in thelegs multi-bend control circuit 101. - The methods and systems of the present disclosure, as described above and shown in the drawings, provide for pressure-regulating valves with superior properties including tunable droop characteristics without increased valve complexity. While the apparatus and methods of the subject disclosure have been shown and described with reference to preferred embodiments.
Claims (5)
- A pressure valve (100) comprising:a valve body (102) having a first end (104) and a second end (106) defining a longitudinal axis (A) therebetween, the valve body (102) including an inlet port (108), an outlet port (110) and a sense port (112), wherein all ports are in fluid communication with the valve body to regulate pressure at the outlet port based on pressure at the sense port (112);a multi-bend control circuit (101) in fluid communication with the outlet port (110) and the sense port (112), wherein the multi-bend control circuit includes:a first circuit leg (103) extending from the outlet port in a first direction;a second circuit leg (105) extending at an angle from the first circuit leg in a second direction;a third circuit leg (107) extending at an angle from the second circuit leg in a third direction different from the second direction and characterized by the first, second and third circuit legs forming a sigmoidal flow path extending from and flowing away from the outlet port;a sense line tap (120) in fluid communication with at least one of the first, second or third legs at a point that has pressure less than that of the outlet port; anda sense line fluidly connecting the sense port and the sense line tap (120), and wherein the third direction is oblique with respect to a plane defined by the first and second directions.
- A pressure valve as recited in claim 1, wherein the second direction is perpendicular to the first direction.
- A pressure valve as recited in any of claims 1 to 2, wherein the third direction is perpendicular to the second direction.
- A pressure valve as recited in any of claims 1 to 3, wherein the third direction is at an angle with respect to the first direction.
- A pressure valve as recited in any of claims 1 to 4, wherein a portion of the second circuit leg extends beyond the intersection of the second circuit leg and the third circuit leg.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/664,533 US9933080B2 (en) | 2015-03-20 | 2015-03-20 | Pressure-regulating valves |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3070568A1 EP3070568A1 (en) | 2016-09-21 |
EP3070568B1 true EP3070568B1 (en) | 2020-04-29 |
Family
ID=55699373
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16161247.8A Active EP3070568B1 (en) | 2015-03-20 | 2016-03-18 | Pressure-regulating valves |
Country Status (2)
Country | Link |
---|---|
US (1) | US9933080B2 (en) |
EP (1) | EP3070568B1 (en) |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2225916A (en) | 1940-12-24 | Fluid pressure regulating device | ||
US1567995A (en) * | 1925-01-31 | 1925-12-29 | Ruggles Klingemann Mfg Co | Pressure regulator |
US1860516A (en) * | 1927-05-10 | 1932-05-31 | John V Thomas | Fluid flow control system |
US1800352A (en) * | 1929-05-20 | 1931-04-14 | Surface Combustion Corp | Pressure regulator and cut-off |
US2199728A (en) * | 1938-05-18 | 1940-05-07 | Frank L Overson | Sight feed control of water softening treatment for boilers |
US2853268A (en) * | 1954-03-25 | 1958-09-23 | Reynolds Gas Regulator Company | Pressure regulator |
US3762435A (en) * | 1972-04-12 | 1973-10-02 | J Auwerter | Pressure reducing valve |
US4044792A (en) * | 1975-06-19 | 1977-08-30 | Odin Clorius A/S | Diaphragm operated pressure regulator |
GB2158616A (en) | 1984-05-10 | 1985-11-13 | Anthony Charles Robert Johnson | Hydraulic operated pressure reducing valve |
JPS61136047A (en) | 1984-12-04 | 1986-06-23 | Nissan Motor Co Ltd | Pressure regulating valve |
US5230362A (en) | 1989-07-24 | 1993-07-27 | United Technologies Corporation | Compensated pressure controller |
JP2775381B2 (en) | 1993-09-02 | 1998-07-16 | 伸五 横田 | Self-cleaning type automatic constant pressure lift valve device |
US6263905B1 (en) | 1996-10-08 | 2001-07-24 | Kabushiki Kaisha Yokota Seisakusho | Automatic regulating valve apparatus |
-
2015
- 2015-03-20 US US14/664,533 patent/US9933080B2/en active Active
-
2016
- 2016-03-18 EP EP16161247.8A patent/EP3070568B1/en active Active
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
EP3070568A1 (en) | 2016-09-21 |
US20160273667A1 (en) | 2016-09-22 |
US9933080B2 (en) | 2018-04-03 |
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